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A215686 as a simple table

n a(n)
0 1
1 12
2 690
3 52808
4 4558410
5 420421056
6 40433534960
7 4002511248720
8 404653074076602
9 41573640435563720
10 4325688482694408060
11 454713687334494619200
12 48204482093235945250800
13 5146506898529612988887424
14 552782991828545241240684480
15 59682974236253934536767852960

[1,12,690,52808,4558410,420421056,40433534960,
 4002511248720,404653074076602,41573640435563720,
 4325688482694408060,454713687334494619200,
 48204482093235945250800,5146506898529612988887424,
 552782991828545241240684480,
 59682974236253934536767852960]

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Last modified September 30 18:12 EDT 2020. Contains 337440 sequences. (Running on oeis4.)